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client-ip=40.67.248.234; helo=nebula.arm.com; From: Penny Zheng To: , , CC: , , , Subject: [PATCH v5 1/7] xen/arm: introduce new helper device_tree_get_meminfo Date: Tue, 24 Aug 2021 09:50:39 +0000 Message-ID: <20210824095045.2281500-2-penny.zheng@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210824095045.2281500-1-penny.zheng@arm.com> References: <20210824095045.2281500-1-penny.zheng@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-EOPAttributedMessage: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 5dcdf328-ea6d-4fe2-2d1f-08d966e4b771 X-MS-TrafficTypeDiagnostic: AM0PR08MB3812:|VI1PR08MB3389: X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true NoDisclaimer: true X-MS-Oob-TLC-OOBClassifiers: OLM:393;OLM:393; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:40.67.248.234;CTRY:IE;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:nebula.arm.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(4636009)(39860400002)(376002)(346002)(136003)(396003)(46966006)(36840700001)(336012)(26005)(426003)(186003)(86362001)(7696005)(82310400003)(83380400001)(47076005)(36860700001)(1076003)(2616005)(2906002)(44832011)(4326008)(316002)(70586007)(70206006)(6666004)(36756003)(8676002)(5660300002)(8936002)(478600001)(54906003)(110136005)(356005)(81166007)(82740400003)(36900700001);DIR:OUT;SFP:1101; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Aug 2021 09:51:16.5290 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5dcdf328-ea6d-4fe2-2d1f-08d966e4b771 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AM5EUR03FT027.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR08MB3389 X-ZohoMail-DKIM: pass (identity @armh.onmicrosoft.com) X-ZM-MESSAGEID: 1629798714558100001 Content-Type: text/plain; charset="utf-8" A few functions iterate over the device tree property to get memory info, like "reg" or the later "xen,static-mem", so this commit creates a new help= er device_tree_get_meminfo to extract the common codes. Signed-off-by: Penny Zheng --- xen/arch/arm/bootfdt.c | 68 ++++++++++++++++++++++++------------------ 1 file changed, 39 insertions(+), 29 deletions(-) diff --git a/xen/arch/arm/bootfdt.c b/xen/arch/arm/bootfdt.c index 476e32e0f5..8c81be3379 100644 --- a/xen/arch/arm/bootfdt.c +++ b/xen/arch/arm/bootfdt.c @@ -63,6 +63,44 @@ void __init device_tree_get_reg(const __be32 **cell, u32= address_cells, *size =3D dt_next_cell(size_cells, cell); } =20 +static int __init device_tree_get_meminfo(const void *fdt, int node, + const char *prop_name, + u32 address_cells, u32 size_cell= s, + void *data) +{ + const struct fdt_property *prop; + unsigned int i, banks; + const __be32 *cell; + u32 reg_cells =3D address_cells + size_cells; + paddr_t start, size; + struct meminfo *mem =3D data; + + prop =3D fdt_get_property(fdt, node, prop_name, NULL); + if ( !prop ) + return -ENOENT; + + cell =3D (const __be32 *)prop->data; + banks =3D fdt32_to_cpu(prop->len) / (reg_cells * sizeof (u32)); + + for ( i =3D 0; i < banks && mem->nr_banks < NR_MEM_BANKS; i++ ) + { + device_tree_get_reg(&cell, address_cells, size_cells, &start, &siz= e); + /* Some DT may describe empty bank, ignore them */ + if ( !size ) + continue; + mem->bank[mem->nr_banks].start =3D start; + mem->bank[mem->nr_banks].size =3D size; + mem->nr_banks++; + } + + if ( i < banks ) + { + printk("Warning: Max number of supported memory regions reached.\n= "); + return -ENOSPC; + } + return 0; +} + u32 __init device_tree_get_u32(const void *fdt, int node, const char *prop_name, u32 dflt) { @@ -139,14 +177,6 @@ static int __init process_memory_node(const void *fdt,= int node, u32 address_cells, u32 size_cells, void *data) { - const struct fdt_property *prop; - int i; - int banks; - const __be32 *cell; - paddr_t start, size; - u32 reg_cells =3D address_cells + size_cells; - struct meminfo *mem =3D data; - if ( address_cells < 1 || size_cells < 1 ) { printk("fdt: node `%s': invalid #address-cells or #size-cells", @@ -154,27 +184,7 @@ static int __init process_memory_node(const void *fdt,= int node, return -EINVAL; } =20 - prop =3D fdt_get_property(fdt, node, "reg", NULL); - if ( !prop ) - return -ENOENT; - - cell =3D (const __be32 *)prop->data; - banks =3D fdt32_to_cpu(prop->len) / (reg_cells * sizeof (u32)); - - for ( i =3D 0; i < banks && mem->nr_banks < NR_MEM_BANKS; i++ ) - { - device_tree_get_reg(&cell, address_cells, size_cells, &start, &siz= e); - /* Some DT may describe empty bank, ignore them */ - if ( !size ) - continue; - mem->bank[mem->nr_banks].start =3D start; - mem->bank[mem->nr_banks].size =3D size; - mem->nr_banks++; - } - - if ( i < banks ) - return -ENOSPC; - return 0; + return device_tree_get_meminfo(fdt, node, "reg", address_cells, size_c= ells, data); } =20 static int __init process_reserved_memory_node(const void *fdt, int node, --=20 2.25.1